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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        // 引用数据类型 占两块内存  --既传值也传址
        var obj = {
            name:"李四"
        }
        var wang = obj;
        obj.age = 18;
        console.log(obj);
        console.log(wang);
    </script>
</body>
</html>